[Tails-l10n] Release schedule for Tails 5.17

Hi,

I will be the RM for Tails 5.17.

The current plan is:

- Monday, September 4: build images, start testing
- Tuesday, September 5: releasing

@testers, please let me know how much time you'll have for manual QA
from Monday 17:00 to Tuesday 11:00 (Europe/Berlin).

Cheers,
--
intrigeri